Research progress on the central mechanism underlying regulation of visceral biological rhythm by per2 (Review)

  • Authors:
    • Liting Zhu
    • Jun Yu
    • Wenyi Zhang
    • Bin Xie
    • Yi Zhu
  • View Affiliations

  • Published online on: September 11, 2014     https://doi.org/10.3892/mmr.2014.2559
  • Pages: 2241-2248
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Abstract

The period circadian clock 2 (per2) gene plays an important role in modulating the circadian rhythm in the central nervous system. Its protein product, PER2, is mainly expressed in the suprachiasmatic nucleus (SCN) and limbic system, including the central nucleus of the amygdala (CeA), the bed nucleus of the stria terminalis (BNST) and the hippocampus. PER2 rhythmic expression regulates hypothalamus‑pituitary‑adrenal (HPA) axis excitability and circadian rhythm via integration of optical signals and corticotropin‑releasing factor (CRF) stress‑related neurotransmitters, resulting in circadian rhythmicity in target organs. Moreover, glucocorticoids and glucocorticoid receptors exert strong negative feedback to the HPA axis and certain regions of the limbic system, modulating rhythmic per2 expression in peripheral organs. To date, the mechanism of action of PER2 in the limbic system and the HPA axis remains unclear, yet the per2 gene is considered valuable in clinical research for the study of metabolic syndromes, functional gastrointestinal disorders and certain liver diseases. In this review, we summarize the biological effects of the per2 gene and its protein product, PER2, in the limbic system, its involvement in regulation of the HPA axis by the limbic system and the resulting effects on the biological rhythm of target organs, and its clinical significance.
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November-2014
Volume 10 Issue 5

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Zhu L, Yu J, Zhang W, Xie B and Zhu Y: Research progress on the central mechanism underlying regulation of visceral biological rhythm by per2 (Review). Mol Med Rep 10: 2241-2248, 2014.
APA
Zhu, L., Yu, J., Zhang, W., Xie, B., & Zhu, Y. (2014). Research progress on the central mechanism underlying regulation of visceral biological rhythm by per2 (Review). Molecular Medicine Reports, 10, 2241-2248. https://doi.org/10.3892/mmr.2014.2559
MLA
Zhu, L., Yu, J., Zhang, W., Xie, B., Zhu, Y."Research progress on the central mechanism underlying regulation of visceral biological rhythm by per2 (Review)". Molecular Medicine Reports 10.5 (2014): 2241-2248.
Chicago
Zhu, L., Yu, J., Zhang, W., Xie, B., Zhu, Y."Research progress on the central mechanism underlying regulation of visceral biological rhythm by per2 (Review)". Molecular Medicine Reports 10, no. 5 (2014): 2241-2248. https://doi.org/10.3892/mmr.2014.2559